290620072 has 8 divisors (see below), whose sum is σ = 544912650. Its totient is φ = 145310032.

The previous prime is 290620063. The next prime is 290620073. The reversal of 290620072 is 270026092.

It can be written as a sum of positive squares in only one way, i.e., 263932516 + 26687556 = 16246^2 + 5166^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 290620072.

It is not an unprimeable number, because it can be changed into a prime (290620073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18163747 + ... + 18163762.

Almost surely, 2^290620072 is an apocalyptic number.

It is an amenable number.

290620072 is a deficient number, since it is larger than the sum of its proper divisors (254292578).

290620072 is a wasteful number, since it uses less digits than its factorization.

290620072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36327515 (or 36327511 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 290620072 is about 17047.5825852230. The cubic root of 290620072 is about 662.3820201445.

The spelling of 290620072 in words is "two hundred ninety million, six hundred twenty thousand, seventy-two".